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Finding the Fourth Proportional to 1,182.41, 1,772.27 and 920.48

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Solution

The fourth proportional to 1,182.41, 1,772.27 and 920.48 is: 1,379.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.41 : 1,772.27 = 920.48 : x
  2. Step 2: Convert to fraction form
    1,182.41/1,772.27 = 920.48/x
  3. Step 3: Cross multiply
    1,182.41x = 1,772.27 × 920.48
  4. Step 4: Simplify right side
    1,182.41x = 1,631,339.09
  5. Step 5: Solve for x
    x = 1,631,339.09/1,182.41
  6. Step 6: Final answer
    x = 1,379.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.